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Suppression of multiple ion bunches and generation of monoenergetic ion beams in laser foil-plasma

ISSN号：1674-1056
期刊名称：《中国物理B：英文版》
时间：0
分类：TN24[电子电信—物理电子学] O484.1[理学—固体物理;理学—物理]
作者机构：[1]College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China, [2]Department of Mathematics and Physics, Shijiazhuang Tiedao University, Shijiazhuang 050043, China, [3]College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China, [4]School of Information Engineering, Nanchang University, Nanchang 330031, China
相关基金：Project supported by the National Natural Science Foundation of China （Grant Nos. 10875015, 10725521 and 10834008）, and the National Basic Research Program of China （Grant No. 2006CB806004）.

作者：张闪[1,2], 谢柏松[1], 洪学仁[1,3], 吴海城[1], 艾米尔丁·艾米都拉[1], 赵学燕[1], 刘明萍[4]

关键词：多离子束, 激光产生, 等离子, 非相对论, 激光脉冲, 目标优化, 辐射压力, 加速机制, interaction of ultrastrong laser pulse and plasma, radiation pressure acceleration, optimum target thickness

中文摘要：

In one-dimensional particle-in-cell simulations,this paper shows that the formation of multiple ion bunches is disadvantageous to the generation of monoenergetic ion beams and can be suppressed by choosing an optimum target thickness in the radiation pressure acceleration mechanism by a circularly polarised laser pulse.As the laser pulse becomes intense,the optimum target thickness obtained by a non-relativistic treatment is no longer adequate.Considering the relativistic Doppler-shifted pressure,it proposes a relativistic formulation to determine the optimum target thickness.The theoretical predictions agree with the simulation results well.The model is also valid for two-dimensional cases.The accelerated ion beams can be compelled to be more stable by choosing the optimum target thickness when they exhibit some unstable behaviours.

英文摘要：

In one-dimensional particle-in-cell simulations, this paper shows that the formation of multiple ion bunches is disadvantageous to the generation of monoenergetic ion beams and can be suppressed by choosing an optimum target thickness in the radiation pressure acceleration mechanism by a circularly polarised laser pulse. As the laser pulse becomes intense, the optimum target thickness obtained by a non-relativistic treatment is no longer adequate. Considering the relativistic Doppler-shifted pressure, it proposes a relativistic formulation to determine the optimum target thickness. The theoretical predictions agree with the simulation results well. The model is also valid for two-dimensional cases. The accelerated ion beams can be compelled to be more stable by choosing the optimum target thickness when they exhibit some unstable behaviours.

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